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PCI: remove redundant __msi_set_enable()

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We have the 'pos' of the MSI capability at all locations which call
msi_set_enable(), so pass it to msi_set_enable() instead of making it
find the capability every time.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Matthew Wilcox 2009-06-16 06:31:45 -06:00 committed by Jesse Barnes
parent 7d9a73f6dc
commit 110828c9cd
1 changed files with 18 additions and 20 deletions
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38
drivers/pci/msi.c
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@ -75,22 +75,17 @@ void arch_teardown_msi_irqs(struct pci_dev *dev)
}
#endif
static void __msi_set_enable(struct pci_dev *dev, int pos, int enable)
static void msi_set_enable(struct pci_dev *dev, int pos, int enable)
{
u16 control;
if (pos) {
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
control &= ~PCI_MSI_FLAGS_ENABLE;
if (enable)
control |= PCI_MSI_FLAGS_ENABLE;
pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
}
}
BUG_ON(!pos);
static void msi_set_enable(struct pci_dev *dev, int enable)
{
__msi_set_enable(dev, pci_find_capability(dev, PCI_CAP_ID_MSI), enable);
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
control &= ~PCI_MSI_FLAGS_ENABLE;
if (enable)
control |= PCI_MSI_FLAGS_ENABLE;
pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
}
static void msix_set_enable(struct pci_dev *dev, int enable)
@ -300,7 +295,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pos = entry->msi_attrib.pos;
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 0);
msi_set_enable(dev, pos, 0);
write_msi_msg(dev->irq, &entry->msg);
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
@ -362,9 +357,9 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
u16 control;
unsigned mask;
msi_set_enable(dev, 0); /* Ensure msi is disabled as I set it up */
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
msi_set_enable(dev, pos, 0); /* Disable MSI during set up */
pci_read_config_word(dev, msi_control_reg(pos), &control);
/* MSI Entry Initialization */
entry = alloc_msi_entry(dev);
@ -396,7 +391,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec)
/* Set MSI enabled bits */
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 1);
msi_set_enable(dev, pos, 1);
dev->msi_enabled = 1;
dev->irq = entry->irq;
@ -593,17 +588,20 @@ void pci_msi_shutdown(struct pci_dev *dev)
struct msi_desc *desc;
u32 mask;
u16 ctrl;
unsigned pos;
if (!pci_msi_enable || !dev || !dev->msi_enabled)
return;
msi_set_enable(dev, 0);
BUG_ON(list_empty(&dev->msi_list));
desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
pos = desc->msi_attrib.pos;
msi_set_enable(dev, pos, 0);
pci_intx_for_msi(dev, 1);
dev->msi_enabled = 0;
BUG_ON(list_empty(&dev->msi_list));
desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS, &ctrl);
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &ctrl);
mask = msi_capable_mask(ctrl);
msi_mask_irq(desc, mask, ~mask);